Pattern mechanism for looms.



PATENTED MAR. 14, 1905.

R. GROMPTON.

PATTERN MECHANISM FOR LOOMS.

APPLICATION FILED SEPT. 19I 1904.

2 BHEETBSHEET 1.

liwcnior: Randolph fi'ompion, by W PATENTED MAR. 14, 1905-.

R. GROMPTON. PATTERN MECHANISM FOR LOOMS.

APPLICATION FILED SBPT.19, 1904.

. 2 SHEETS-SHEET 2.

fiwenior: Muiolphfiompion,

NITED STATES Patented March 14, 1905.

PA'TENT OFFICE.

RANDOLPH CROMPTON, OF WVORCESTER, MASSACHUSETTS, ASSIGNOR TO RANDOLPH OROMPTON, GEORGE CROMPTON, EDWARD D. THAYER, AND \VILLIAM B. SCOFIELD, OF \VORCESTER, MASSACHUSETTS.

PATTERN MECHANISM FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 784,550, dated March 14, 1905.

Application filed September 19, 1904. Serial No. 225,034.

To (all whom it may concern.-.

Be it known that I. RANDOLPH CRoMPToN, a citizen of the United States, anda resident of Vorcester, in the county of WVorcester and State of Massachusetts, have invented an 1mprovement in Pattern Mechanism for Looms, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates to novel means for use in controlling shifting shuttle-boxes, and comprehends a novel pattern-surface containing in itself means for using any pick-indicator bar any desired number of times, doing away with extraneous pattern chains, which are moved at times when any pick-indicator of the pattern-chain is to be repeated.

Prior to this invention it has been customary in looms to provide means whereby through one or a plurality of auxiliary pat tern'mechanisms the regular movement of the pattern surface or chain characterizingthe work to be done inthe loom might be suspended for a predetermined number of picks in order that any one pick-bar of the pattern surface or chain might be used over and over again for the number of picks predetermined by the auxiliary pattern mechanism.

1 have aimed to dispense with usual auxiliary pattern mechanisms and means for moving the same and at the same time gain the advantages to be derived by the employment of a short chain, and as 1 have carried out my invention 1 have greatly increased the variety of work that can be done in a loom controlled by my novel pattern-surface.

In accordance with my invention besides the usual pick-bars and their rollers I have provided the pattern surface or chain with pick-repeating indicators varying in height,

each indicator when brought by the patternchain into operative position acting to move into its abnormal position a pick-suspending device, the extent of movement of said device depending upon the size of the particular repeating-indicator brought into operative position.

Whenever a pick-repeating indicator, there being a plurality of the same carried by the 5 pattern-surface, comes into working position, it acts to move into an abnormal position a pick-suspending device, herein shown as a toothed segment, the extent of the movement of which into its abnormal position depends upon the size or dimension of the pick-repeating indicator then in operative position. After this the pick-suspending device is moved back into its normal position step by step, the number of steps required to move it back into its abnormal position being, as herein shown, equal to half the number of picks which will be put in by the particular pickrepeating indicator which was operative to put the pick-suspending device into its ab- 5 normal position.

When the pick-suspending device is moved into an abnormal position by one of the pickrepeating indicators, a pin thereon retires from one arm of a controller, represented as 7 a rock-shaft, having at one end a long finger which rests just below the pawl that engages a ratchet on the shaft of and actuates the pattern-surface, said pawl being therefore the actuator for the pattern-shaft. The movement of the controller causes said finger to be moved in a direction to throw said pawl out of engagement with said ratchet Wheel, the pawl thereafter acting to turn the said controller in an opposite direction or into its normal position step by step, and when said controller arrives in its normal position said pawl again engages the ratchet-wheel of the pattern-surface and moves the latter to bring another bar having another pick-indicator into operative position.

Figure 1 is a top or plan view of a pattern mechanism embodying my invention. Fig. 2 is a section of Fig. l to the left of the dotted line :0. Fig. 2 is a detail of the pattern-sur o face and pick-repeating indicators. Fig. 3 is an elevation of the pattern-surface as it will appear from the front side of the loom. Fig.

4 is an elevation as it will appear from the rear side of the loom, the hand-wheel for moving the pattern-surface being omitted.

The pattern-surface shaft (6, the notched wheel a, fast thereon, the pattern chain or surface carried thereby and shown as composed of a series of links connected by bars or rods (0 having usual rolls or pick-indicators a to act on the usual fingers a (see Fig. 4,) supported above the said chain, said fingers having their fulcrum on the stud a, (but one of said fingers being, however, shown in the drawings,) the rod (fi connected to said finger and controlling the box-motion-sliding gear, (not shown,-) the rod (0 actuated by a cam on the usual lower cam-shaft-of the loom, the elbow-lever or pawl-carrier a, pivoted at a and actuated by said rod and provided with a pawl a adapted to engage the teeth of a ratchet-wheel a, fast on the pattern-sh aft, and

the locking-wheel (6 havingdepressions to be engaged by a roller a of a lever a are and may be all as usual in shifting shuttlebox looms.

In accordance with my invention I provide some of the bars or rods of the pattern-surface or the links of the chain (see Figs. 4 and 2) at suitable or desired intervals apart with pick-repeating indicators, (represented at Z) Z),) they being of different size, dimension, or height.

I have mounted loosely upon the patternsurface shaft the hub of a pick-suspending device b it being represented as a toothed segment of about one hundred and eighty degrees in lengthprovided with a pin 2, which normally rests in a notch 20 in an arm 0 of. the controller.

The hub of the pick-suspending device L is provided with a gear 6', (shown in Figs. 1 and 2,) which is at all times engaged by the teeth .of a toothed sector 6, made as a lever pivoted at 6 the short arm of said lever being attached by a link I) to a lever 5, mounted on a stud 7/ the said lever. 6 having a finger provided with a roller or other stud I), which is acted upon during the rotation of the pattern-chain by one after another of the pick-repeating indicators, each indicator on its arrival under said roll raising said lever and causing it to immediately and quickly turn the segment if from its normal position, as stated, in the direction of the arrow on it, Figs. 2 and 4, for a greater or less distance into an abnormal position, that depending upon the size, height. or dimension of the pick-repeating indicator. I have surrounded the hub of said'device Z2 with a friction device 6 shown as a metallic strap (see Figs. 2 and 4) attached to the head A, upon which the pattern-surface mechanism is mounted, by a suitable bolt or nut b and embracing at its upper end said hub.

The pick-repeating indicators 12 1) may be of a size to cause the pattern-surface to rest for a period of fifty-six picks, or twice the number of teeth contained in the pick-suspending device V, the number of teeth herein shownbeing twenty eight. For instance, viewing Fig. 4, where the pick-suspending indicator is represented in one of its abnormal positions, the pattern-surface or chain will rest or will not be moved while the loom makes twenty-eight picksthat is, two picks for each tooth of the pick-suspending device, which is moved into its normal'position by means which will be hereinafter described. If it were desired to suspend the pattern-sur face for but four picks, then the pick-repeating indicator would be of such size as to lift the lever Z) only far enough to cause the segment 5 to turn the pick-suspending device backwardly into an abnormal position for the distance of two teeth instead of for the distance of fourteen teeth, as indicated in Fig. 2.

The pick-suspending indicator hereinshown is of a size or dimension sufficient to turn the pick-Suspender backwardly into the position Fig. 2, wherein it willbe noticed that the pin 2 has retired from the arm 0 of the controller, said controller including a shaft 0 and a fixed arm 0 extended to constitute a finger a.

When the spring 0 moves the controller, it being released by the pin 2, the finger 0 acting on the end of the pawl a raises the same out of contact with the teeth a of the ratchet wheel fast on the pattern cylinder shaft, and as long as said pawl is retained in its elevated position the rotation of the pattern-shaft is suspended. The pawl a comes again into action only after the pick-suspending device has been ratcheted back into its normal position and the pin 2 enters the notch 20, and in so doing by passing the incline at the end of the controller the latter is turned against the action of the spring 0", letting the pawl drop in position to again engage the teeth a.

The pick-suspending device is moved back step by step from its abnormal position into its normal position. by or .through a pawl 0, mounted on an arm 0 carried by the inner end of the rocking stud a, said pawl having a laterally-projecting pin (Z, which rests on a lever (Z, pivoted at (Z one end (Z of said lever being extended backwardly, as shown, to be struck by an arm or projection (Z at one end of the lever (i pivoted at d, said lever d being acted upon by the pick-repeating indicator, which lifts the lever 6 to putthe picksuspending device in its abnormal position, the rising movement of the lever d, which is normally held by the spring (Z causing the projection (Z to be lifted from the lever cl, letting the heavier end of the pawl 0 drop, so that the pin (Z thereof may engage the teeth of the pick-suspending device and ratchet-it back a tooth at a time. Each tooth of the pick-suspending device represents two picks of the shuttle, and While the pick-suspending device is being so ratcheted back step by step into its normal position the same bar or rod having the pick-repeating indicator remains in position to cause the roll or rolls on it to retain its operative position.

It will thus be understood that'thepick-suspending device is free to be turned into its abnormal position, the movement being for a.

greater or less distance, that depending upon the height of the particular repeating-indicator brought by the pattern surface or chain under the roller carried by the lever 6, and this pick-suspending device in any of its abnormal positions, Which, it will be understood, are variable positions, must be put back into its normal position step by step, and the number of teeth ratcheted over by the pawl c in bringing the pick-transferring device back again into its normal position determines the number of picks that any one indicator-bar of the pattern surface or chain then'in Working position shall put in.

The lever 6 sector 6 and connections constitute one good and desirable means for turning the pick-suspending device into its abnormal position; but instead of said device I may employ any other usual or suitable means for turning the pick-suspending device into its abnormal position.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a loom, a pick-suspending device, and a pattern surface or chain having a pick-suspending indicator carried thereby to move said device over varying distances according to the size of the pick-suspending indicator.

2. In a loom, a pick-suspending device, and a pattern surface or chain having a plurality of pick-suspending indicators carried thereby and varying in size, each indicator when in its operative position moving said device over varying distances according to the size of the I pick-suspending indicator.

3. In a loom, a single pattern-surface having a plurality of pick-suspending indicators varying in their height, combined with a single pick-suspending device under the control of said indicators and adapted to vary the length of time that the pattern-surface is stopped according to the particular indicator that is in operative position.

a. In a loom, a pattern-surface provided at intervals of its length with pick-suspending indicators, and means acting thereby to suspend the movement of the pattern-surface for a longer or shorter interval according to the size of the pick-suspending indicator.

5. In a loom, a pattern-surface provided at intervals of its length with pick-suspending indicators, means to move said pattern-surface step by step, and means actuated by said pick-suspending indicators to suspend the movement of the pattern-surface for a longer or shorter interval according to the size of the pick-suspending indicator.

6. In aloom, a pattern surfaceor chain provided with pick-suspending indicators, means for moving the pattern surface or chain, a pick-suspending device, a controller, means to move the suspending device backwardly into a variable abnormal position according as the one or the other pick-suspending indicator is in operative position, and means to return said pick-suspending device step by step into its abnormal position.

7. In a loom,the followinginstrumentalities: a pattern-shaft, actuating means for operating said shaft, a pattern-su rface carried thereby having pick-bars provided with indicators and pick-repeating indicators, a single picksuspending device under the control of the pick-repeating indicator and arranged to suspend the operation of the pattern-surface for a varying number of picks, preparatory to reoperating the pattern-surface.

8. In a loom, a toothed pick-Suspender, means to move the same into its abnormal position at one step, a pawl, means to cause it to engage the teeth of the pick-suspending device when the same has been brought into its abnormal position, and means to actuate said pawl to turn said pick-suspending device back step by step into its normal position.

9. In a loom,the following instrumentalities, viz: a pattern-shaft, actuating means for moving said shaft intermittingly, a pattern-surface thereon have pick-indicators and pickrepeating indicators, a controlling device to control the said actuating means, a pick-suspending device, and means to operate it for a varying distance into an abnormal position according to the dimensions of the pick-repeating indicator then in working position, and through said movement permit the said controller to operate and suspend the effective action .of said actuating means, and devices to engage and move said pick-suspending device back step by step into its normal position, the final movement of said pick-suspending device letting the pattern-shaft-actuating mechanism again operate to move the pattern-surface, substantially as described.

10. The pattern-shaft, a pattern-surface carried thereby, a pawl to engage a ratchet on, and to move, said shaft intermittingly, a picksuspending device composed of a toothed plate, and a controller operated thereby and interposed between said suspending device and said pawl, combined with means to move said suspender for a varying distance in one direction at one step, that depending upon the number of picks the pick-indicator then in working position is called upon to repeat that pick, and means to thereafter move said pick-suspending device back into its normal position by a step-by-step motion while the said picks are being repeated, substantially as described.

11. In a loom,a pattern-surface having picksuspending indicators varying in size, means to sustain the pattern-surface, means to move the pattern-Snrface-sustaining means and pat- IIS 10 operative position depending on the number of movements necessary to restore the picksuspending' device to its normal position.

In testimony whereof I have signed my name to this specification in the presence of tWo subscribing Witnesses.

RANDOLPH CROMPTON.

Witnesses:

CHARLES F. ALDRICH, GRACE O. BEMIS. 

